So we could ask, in this narrow sense, what properties do languages have and then go on to ask, in a broader sense, what other communicative systems also possess those properties.

我们可以发问,从狭义上说,语言拥有何种特性,然后我们可以接着发问,从广义上说,哪些其他的交流系统也同样拥有那些特性

耶鲁公开课 - 心理学导论课程节选